Good find. The springs that I had made are 290#/" and seated pressure can be easily set as they were designed to use the original WR guides, therefore if W or K series, a spacer is required. On my WLAK I used the stock K upper collars with no additional setup required.Just fired it today and ooohhh yeah!

37.Couple of questions for you.When increasing the seated presure did you investigate additinal help for the cam and lifters? Something like Dicronite? Ya there rollers but the loads gone up 1.5 times.What about the valves? Are they new? Is the head to stem area changed from stock? (lots of times with V8 stuff we have to use a non undercut stem to keep the head from snapping off BUT this impacts flow in to the chamber)On the Keeper end of the stem are they new keepers and are they hardened?

Just wondering not tring to pee in the sandbox.

44

Last edited by 44dwarf on Wed Oct 28, 2009 10:03 am, edited 1 time in total.

Sorry I haven't responded sooner but have been out o town. I used KH intake valves and yes a little reshaping/ lightening was done. stock bottom collars and keepers were used.KHK camsV*= vintage , vtwin??? Trying to cut them to KR specifications? What manufacturer or supplier?Went over 95mph this weekend on it's first pass.

So it appears KNS does not offer the big intakes or stiff springs anymore. So, I did a search and found this thread. I have 8 of the Crower #68150 springs here as of today. I just did a pressure test and Panic's figures are right on. I am using Chevy 235 intakes, so for a seated pressure of 90lbs, I went with .425 spacers on the exhaust and .550 spacers on the intakes. The intakes are different because of the Chevy collar needing more spacing for the 90 lbs seat pressure. Pressure at .375 is 173 lbs on my Rimac spring tester. THANK YOU PANIC! I have been combing through my Big Book again by the way. So much food for thought and application. In case you wanted to know...I am doing two 4 5/8 strokers with hot cams, big intakes, stiff springs and sportster oil pump with piston oilers. I did one in 2008 with KNS parts. Delta are grinding my cams for [about] fourty five bucks a lobe, Chevy 235 intakes with locks were nine bucks each, and the springs were [roughly] eighty five bucks for all eight.

Bsatom, you posted a vídeo on youtube of your wl 4 5/8 stroker some years ago, didn't you? If I remember correctly it also had bigger intake valves, a British transmission and Sporty pump, right? So, what about that bike? Can you tell us about how the 'performance combo' has performed since then? How did you like it? Thanks.

Bsatom. It seem like KNS still lists their big valves and heavy duty springs. http://victorylibrary.com/kns/parts.htmI've used their big valve and springs with good experience and am about to build another 45 with big intake valve.

But if they dont have the big valves anymore, time to look for another supplier.

Yeah, that bike was fun. I took it off Youtube when I sold it. It had KNS hot cams, KNS big valves, KNS stiff springs, Sporty oil pump, piston oilers, cam needle bearings (which I do not do any more as Buell used all cam bushings in the XB9/12 with no problems), ported and relieved. 4 5/8 stroke with the pre cam ground T&O stroker pistons. Here is how I accidently got them to not seize due to the lack of cam grind(which they "solved" by hand sanding every piston very crudely on a belt sander, leaving less than one inch of thrust face on the skirts?!?). Anyway, my cylinders had to go out to .007 piston clearance to clean up. I had a problem. Swain Tech has a skirt coating called PC-9 that can be applied at .002 thick just to tighten up a piston in its bore. I did that and had .003 clearance that never seized on me with hard summer freeway runs. That bike was very streetable and also turned on like a 2 stroke at about 3900rpm. That bike ran with the big twin Evo bikes no problem, until they decided to see if they could leave me. They could with 80 cid of hopped up OHV engine and 5 speed trannys. I am building another with a Harley 4 speed right now instead of the Norton Commando trans. I make my own belt drives too.